/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package it.evento.controllers;

import it.evento.BusinessLogic;
import it.evento.Users;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FilenameUtils;

/**
 *
 * @author Ilo
 */
public class UploadController extends HttpServlet {

    @EJB
    private BusinessLogic businessLogic;
    
    private HttpSession session;
    
    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        
        session = request.getSession();
        
        try (PrintWriter out = response.getWriter()) {
            if(request.getParameter("profilephoto") != null) {
                String path = request.getServletContext().getRealPath("/images/data/userphotos/");
                File uploadFolder = new File(path);
                
                Users loggedUser = (Users)session.getAttribute("loggedUser");
                
                try {
                    List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
                    for (FileItem item : items) {
                        String fileName = FilenameUtils.getName(item.getName());
                        String fileNamePrefix = "user_" + loggedUser.getId() + "_" + FilenameUtils.getBaseName(fileName) + "_";
                        String fileNameSuffix = "." + FilenameUtils.getExtension(fileName);
                        
                        File uploadedFile = File.createTempFile(fileNamePrefix, fileNameSuffix, uploadFolder);
                        item.write(uploadedFile);
                        
                        loggedUser.setPhoto(uploadedFile.getName());
                        businessLogic.updateUser(loggedUser.getId(), loggedUser);
                    }
                } catch (FileUploadException e) {
                    throw new ServletException("Cannot parse multipart request.", e);
                } catch (Exception ex) {
                    Logger.getLogger(UploadController.class.getName()).log(Level.SEVERE, null, ex);
                }
                
                response.sendRedirect(request.getHeader("referer"));
            }
            else {
                System.err.println("Unsupported Upload Type");
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
